** icona in notifiche come quella in mappe **

Sources/EQNNotificationService/NotificationService.swift

@@ -9,6 +9,7 @@
 import UserNotifications
 import CoreLocation
 import Shogun
+import UIKit
 
 class NotificationService: UNNotificationServiceExtension {
 
@@ -119,13 +120,26 @@ class NotificationService: UNNotificationServiceExtension {
         }
         
         // add the icon as notification attachment
-        if !iconName.isEmpty {
-            iconName = iconName.replacingOccurrences(of: ".png", with: "")
-            
-            if let imageUrl = Bundle(for: NotificationService.self).url(forResource: iconName, withExtension: "png"),
-               let attachment = try? UNNotificationAttachment(identifier: iconName, url: imageUrl) {
-                bestAttemptContent.attachments = [ attachment ]
-            }
+//        if !iconName.isEmpty {
+//            iconName = iconName.replacingOccurrences(of: ".png", with: "")
+//            
+//            if let imageUrl = Bundle(for: NotificationService.self).url(forResource: iconName, withExtension: "png"),
+//               let attachment = try? UNNotificationAttachment(identifier: iconName, url: imageUrl) {
+//                bestAttemptContent.attachments = [ attachment ]
+//            }
+//        }
+        
+        do {
+            let image = createImage(for: "M2.3")
+            let imageData = try NotificationServiceImageDownloader.shared.storeImage(image)
+            let imageAttachment = try UNNotificationAttachment(
+                identifier: "image",
+                url: imageData.localUrl,
+                options: nil)
+            bestAttemptContent.attachments = [imageAttachment]
+            bestAttemptContent.title = bestAttemptContent.title + " [IMG]"
+        } catch {
+            bestAttemptContent.title = bestAttemptContent.title + " [ROTTO]"
         }
         
         // remove same type posted notification
@@ -209,4 +223,145 @@ class NotificationService: UNNotificationServiceExtension {
         default: return ""
         }
     }
+    
+    private func createImage(
+        for magnitude: String
+    ) -> UIImage {
+        let frame = CGRect(x: 0, y: 0, width: 200, height: 200)
+        let renderer = UIGraphicsImageRenderer(size: frame.size)
+        let image = renderer.image { ctx in
+            ctx.cgContext.setFillColor(UIColor.white.cgColor)
+            ctx.cgContext.setStrokeColor(UIColor.black.cgColor) // dark
+            ctx.cgContext.setLineWidth(1.0)
+
+            let rectXPadding: CGFloat = 5.0
+            let rectYPadding: CGFloat = 40.0
+            let rectWidth = frame.width - 2*rectXPadding
+            let rectHeight = frame.height - 2*rectYPadding
+            let rectFrame = CGRect(x: rectXPadding, y: rectYPadding, width: rectWidth, height: rectHeight)
+            ctx.cgContext.addRect(rectFrame)
+            ctx.cgContext.drawPath(using: .fillStroke)
+            
+            // text
+            let paragraphStyle = NSMutableParagraphStyle()
+            paragraphStyle.alignment = .center
+            let attrs = [
+                NSAttributedString.Key.font: UIFont.systemFont(ofSize: 60.0, weight: .bold),
+                NSAttributedString.Key.paragraphStyle: paragraphStyle,
+                NSAttributedString.Key.foregroundColor: UIColor.blue
+            ]
+
+            ctx.cgContext.setStrokeColor(UIColor.blue.cgColor)
+            
+            let textMargin: CGFloat = 5.0
+            let textWidth = rectFrame.width - 2*textMargin
+            let textHeight: CGFloat = 60.0
+            let xPos = rectFrame.minX + textMargin
+            let yPos = rectFrame.minY + (rectFrame.height - textHeight) / 2.0
+            let textFrame = CGRect(x: xPos, y: yPos, width: textWidth, height: textHeight)
+            magnitude.draw(with: textFrame, options: .usesLineFragmentOrigin, attributes: attrs, context: nil)
+        }
+        return image
+    }
+}
+
+
+class NotificationServiceImageDownloader {
+    
+    enum DownloadError: Error {
+        case invalidUrl
+        case emptyData
+        case invalidImage
+    }
+    
+    struct Image {
+        let data: Data
+        let png: UIImage
+        let localUrl: URL
+    }
+
+    
+    static let shared = NotificationServiceImageDownloader()
+    
+    // MARK: - Public
+    
+    func downloadAndStoreImage(
+        for stringUrl: String
+    ) async throws -> Image {
+        guard let url = URL(string: stringUrl) else {
+            throw DownloadError.invalidUrl
+        }
+        return try await downloadAndStoreImage(for: url)
+    }
+    
+    func downloadAndStoreImage(
+        for url: URL
+    ) async throws -> Image {
+        // download image from URL
+        let (data, _) = try await URLSession.shared.data(from: url)
+        guard let image = UIImage(data: data) else {
+            throw DownloadError.invalidImage
+        }
+        
+        let identifier = "\(UUID().uuidString).\(url.pathExtension)"
+        let localUrl = try saveImageLocally(image: image, with: identifier)
+        return .init(data: data, png: image, localUrl: localUrl)
+
+    }
+    
+    func storeImage(
+        _ image: UIImage
+    ) throws -> Image {
+        let identifier = "\(UUID().uuidString).png"
+        let localUrl = try saveImageLocally(image: image, with: identifier)
+        return .init(data: Data(), png: image, localUrl: localUrl)
+    }
+    
+    // MARK: - Private
+    
+    private func saveImageLocally(
+        image: UIImage,
+        with identifier: String
+    ) throws -> URL {
+        guard let imageData = image.pngData() else {
+            throw DownloadError.invalidImage
+        }
+        // create a subfolder in Caches directory and
+        // store the given image
+        let cacheDirectory = try FileManager.default.createSubfolder(in: .cachesDirectory, name: "NotificationImages")
+        let fileURL = cacheDirectory.appendingPathComponent(identifier)
+        
+        try imageData.write(to: fileURL)
+        return fileURL
+    }
+}
+
+
+public extension FileManager {
+    
+    /// Check if a subfolder already exists in a search path directory. If the folder does not exists, it will be created.
+    /// - Parameters:
+    ///   - directory: The search path directory
+    ///   - name: Name of the subfolder
+    /// - Returns: URL that specifies the directory
+    func createSubfolder(in directory: FileManager.SearchPathDirectory, name: String) throws -> URL {
+        let searchPathDirectory = urls(for: directory, in: .userDomainMask).first!
+        return try createSubfolder(at: searchPathDirectory, name: name)
+    }
+    
+    /// Check if a subfolder already exists at a given URL. If the folder does not exists, it will be created.
+    /// - Parameters:
+    ///   - directory: The search path directory
+    ///   - name: Name of the subfolder
+    /// - Returns: URL that specifies the directory
+    func createSubfolder(at url: URL, name: String) throws -> URL {
+        let directoryUrl = url.appendingPathComponent(name)
+        
+        var isDirectory: ObjCBool = false
+        if !fileExists(atPath: directoryUrl.path, isDirectory: &isDirectory) {
+            try createDirectory(at: directoryUrl, withIntermediateDirectories: false)
+        }
+        
+        return directoryUrl
+    }
 }